One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,8)(5,7)(9,10)(11,15)(12,14)(13,16)(17,18)(19,23)(20,24)(21,25)(22,26)(27,30)(28,31)(29,32) involution — undirected(1,3,6,2)(4,8,5,7)(9,11,12,16)(10,13,14,15)(17,19,22,28)(18,23,26,31)(20,27,21,29)(24,30,25,32)(10,14)(13,15)(17,20)(18,24)(21,22)(25,26)(27,29)(30,32) involution — undirected(1,4,6,5)(2,7,3,8)(10,14)(13,15)(17,20,22,21)(18,24,26,25)(19,27,28,29)(23,30,31,32)(1,5,6,4)(2,7,3,8)(11,16)(13,15)(17,20)(18,25)(21,22)(23,31)(24,26)(27,29)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.